2088 lines
42 KiB
C++
2088 lines
42 KiB
C++
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Copyright (c) 1989-1999 Microsoft Corporation
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Module Name:
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expr.hxx
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Abstract:
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This file contains the expression class definitions.
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Notes:
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Author:
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VibhasC Jun-06-1993 Created
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Notes:
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This expression evaluator is used by the front and the code generator of
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the midl compiler. It therefore must support the complete gamut of c
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expressions.
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----------------------------------------------------------------------------*/
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#ifndef __EXPR_HXX__
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#define __EXPR_HXX__
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/****************************************************************************
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* include files
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***************************************************************************/
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#include "nulldefs.h"
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#include "common.hxx"
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#include "listhndl.hxx"
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#include "midlnode.hxx"
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extern "C"
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{
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#include <stdio.h>
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}
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#include "stream.hxx"
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#include "ndrtypes.h"
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#define _STRDUP( x, y ) ( (y) ? ((x) = new char[strlen(y)+1] ), strcpy( x, y ) : x = 0)
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class node_skl;
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class EXPR_CTXT;
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typedef char * PNAME;
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typedef __int64 EXPR_VALUE;
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/****************************************************************************
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* extern references
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***************************************************************************/
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/****************************************************************************
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* the meat of the definitions
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***************************************************************************/
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#if 0
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//
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// the class heirarchy for the expression evaluator. The class heirarchy for
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// the expression does not reflect the operator or evaluation precedence. The
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// class heirarchy instead reflects the organisation based on the structure of
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// an object of the expression class. It is upto the generator of the expression
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// to ensure proper precedence. In case the expression is generated by a parser
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// the precedence is automatically ensured. The back end which generates new
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// expressions must therefore ensure that the precedence is properly set up. We
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// will NOT check this.
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//
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expr_node
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expr_variable
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expr_resource
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expr_constant
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expr_operator
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expr_op_unary
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expr_u_arithmetic // + -
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expr_u_not // !
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expr_u_complement // ~
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expr_deref // *
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expr_u_address // &
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expr_cast // (type)
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expr_sizeof // sizeof( type )
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expr_alignof // __alignof( type )
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expr_post_incr // foo++
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expr_pre_incr // ++foo
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expr_post_decr // foo--
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expr_pre_decr // --foo
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expr_op_binary
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expr_b_arith // * / + - %
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expr_b_logical // || &&
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expr_relational // > >= == != < <=
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expr_shift // << >>
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expr_bitwise // |, &, ^
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expr_dot // a.b
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expr_pointsto // a->b
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expr_index // []
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expr_comma // ,
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expr_assign // =
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expr_proc // ()
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expr_statement // ;
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expr_ternary // ?:
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#endif // 0
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//
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// The basic expression class. This class is an abstract base class. It only
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// provides the interface to a general expression node.
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//
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#define _expr_node expr_node
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#define _expr_variable expr_variable
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#define _expr_constant expr_constant
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#define _expr_named_constant expr_named_constant
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#define _expr_operator expr_operator
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#define _expr_op_unary expr_op_unary
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#define _expr_op_binary expr_op_binary
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#define _expr_u_arithmetic expr_u_arithmetic
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#define _expr_u_not expr_u_not
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#define _expr_u_complement expr_u_complement
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#define _expr_u_deref expr_u_deref
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#define _expr_u_address expr_u_address
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#define _expr_cast expr_cast
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#define _expr_sizeof expr_sizeof
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#define _expr_alignof expr_alignof
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#define _expr_pre_incr expr_pre_incr
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#define _expr_pre_decr expr_pre_decr
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#define _expr_post_incr expr_post_incr
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#define _expr_post_decr expr_post_decr
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#define _expr_b_arithmetic expr_b_arithmetic
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#define _expr_b_logical expr_b_logical
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#define _expr_relational expr_relational
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#define _expr_shift expr_shift
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#define _expr_bitwise expr_bitwise
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#define _expr_dot expr_dot
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#define _expr_pointsto expr_pointsto
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#define _expr_index expr_index
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#define _expr_comma expr_comma
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#define _expr_assign expr_assign
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#define _expr_proc_call expr_proc_call
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#define _expr_param expr_param
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//
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// This is the constant expression class. For now this only has simple integral
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// constants. We would need to have this class to be more explicit in that it
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// needs to know the exact type of the constant according to the language
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// rules and know the exact format to be able to print this out. This is
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// necessary so that the generated constant looks the same as the original
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// for the user's convenience.
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//
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typedef enum _pformat {
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VALUE_TYPE_STRING,
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VALUE_TYPE_WSTRING,
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VALUE_TYPE_CHAR,
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VALUE_TYPE_WCHAR,
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VALUE_TYPE_NUMERIC,
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VALUE_TYPE_NUMERIC_U,
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VALUE_TYPE_NUMERIC_LONG,
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VALUE_TYPE_NUMERIC_ULONG,
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VALUE_TYPE_HEX,
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VALUE_TYPE_HEX_U,
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VALUE_TYPE_HEX_LONG,
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VALUE_TYPE_HEX_ULONG,
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VALUE_TYPE_OCTAL,
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VALUE_TYPE_OCTAL_U,
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VALUE_TYPE_OCTAL_LONG,
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VALUE_TYPE_OCTAL_ULONG,
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VALUE_TYPE_BOOL,
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VALUE_TYPE_FLOAT,
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VALUE_TYPE_DOUBLE,
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// RKK64
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// value types for int64
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VALUE_TYPE_UNDEFINED,
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} PFORMAT;
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struct SExprValue
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{
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PFORMAT format;
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union
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{
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signed char ch;
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signed short sh;
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signed int n;
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signed long l;
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unsigned char uch;
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unsigned short ush;
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unsigned int un;
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unsigned long ul;
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__int64 hy;
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float f;
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double d;
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BOOL b;
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wchar_t wch;
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} ;
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};
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typedef node_skl * ETYPE;
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class expr_node
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{
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protected:
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//
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// the type of the expression. All expression nodes need to have a type
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// since a variable / constant will have a type and so will an operation
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// on those variables / constants.
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node_skl * pType;
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BOOL fConstant : 1;
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BOOL fFloatExpr : 1;
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//
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// The constructor. Each expression node is instantiated using a type
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// If the type is unknown at the time of instantiation, then an error type
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// is the type of the expression. Therefore we provide a overloaded
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// constructor for both these situations.
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//
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public:
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expr_node()
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{
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SetType( (node_skl *)0 );
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fConstant = TRUE;
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fFloatExpr = FALSE;
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};
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expr_node( node_skl * pT )
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{
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SetType( pT );
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fConstant = TRUE;
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fFloatExpr = FALSE;
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};
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virtual void CopyTo( expr_node* lhs );
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virtual expr_node* Clone() { return new expr_node; };
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//
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// set the type of the expression.
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//
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void SetType( node_skl * pT )
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{
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pType = pT;
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}
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//
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// get the type of the expression.
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//
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virtual
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node_skl * GetType( void )
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{
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return pType;
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}
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//
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// get the type of the expression. Force it to be determined
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// if it is unknown
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//
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node_skl * AlwaysGetType( void )
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{
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node_skl * pType = GetType();
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if ( !pType )
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{
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DetermineType();
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pType = GetType();
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}
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return pType;
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}
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//
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// determine the type of the expression
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//
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virtual
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void DetermineType()
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{
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}
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//
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// set the "constness" of the expression.
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//
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void SetConstant( BOOL fCon = TRUE )
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{
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fConstant = fCon;
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}
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void SetFloatExpr( BOOL f = TRUE )
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{
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fFloatExpr = f;
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}
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//
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// queries.
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//
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virtual
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BOOL IsAVariable()
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{
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return FALSE;
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}
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virtual
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BOOL IsResource()
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{
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return FALSE;
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}
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virtual
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BOOL IsConstant()
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{
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return fConstant;
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}
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virtual
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BOOL IsOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsUnaryOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsBinaryOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsArithmeticOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsLogicalOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsBitwiseOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsRelationalOperator()
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{
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return FALSE;
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}
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virtual
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BOOL IsShiftOperator()
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{
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return FALSE;
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}
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//
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// test if the expression is a string constant
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//
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virtual
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BOOL IsStringConstant (void)
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{
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return FALSE;
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}
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BOOL IsFloatExpr( void )
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{
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return fFloatExpr;
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}
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//
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// others.
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//
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virtual
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expr_node * GetLeft()
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{
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return 0;
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}
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virtual
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expr_node * GetRight()
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{
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return 0;
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}
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virtual
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OPERATOR GetOperator()
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{
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return OP_ILLEGAL;
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}
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virtual
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EXPR_VALUE GetValue()
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{
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return 0;
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}
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virtual
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BOOL GetExprValue( SExprValue& v )
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{
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v.format = VALUE_TYPE_UNDEFINED;
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return TRUE;
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}
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//
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// Make (or add to) a list of var nodes of an expr
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//
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virtual
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short MakeListOfVars( ITERATOR & pList );
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virtual
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short MakeListOfDerefedVars( ITERATOR& )
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{
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return 0;
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}
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// gaj - this is a dummy routine
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virtual
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EXPR_VALUE Evaluate()
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{
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return GetValue();
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}
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// gaj - end of dummy routines
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//
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// Given an output steam, output the expression.
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//
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virtual
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void Print( ISTREAM * )
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{
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}
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void PrintWithPrefix( ISTREAM * pS, char * Prefix );
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void DecorateWithPrefix( char * Prefix = NULL );
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//
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// This is an overloaded virtual only for the proc_call node.
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//
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virtual
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void PrintCall( ISTREAM * pS,
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short ,
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BOOL )
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{
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Print( pS );
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}
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virtual
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void ExprAnalyze( EXPR_CTXT * pExprCtxt );
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// private allocator
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void * operator new ( size_t size )
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{
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return AllocateOnceNew( size );
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}
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void operator delete( void * ptr )
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{
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AllocateOnceDelete( ptr );
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}
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};
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//
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// This class represents a variable in an expression.
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// This expression node is instantiated for variables specified as fields of
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// a struct/union or as parameters. Contrast this to the resource class which
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// is VERY similar but only corresponds to the internally generated and used
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// variables in the stub routines.
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//
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class expr_variable : public expr_node
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{
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private:
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//
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// the name of the variable.
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//
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PNAME pIDName;
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char * pPrefix;
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public:
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//
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// the constructor expects the object to be instantiated using a name.
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// Sometimes one needs to instantiate a variable using the type too.
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//
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expr_variable( PNAME p )
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{
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SetName( p );
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SetType( (node_skl *)0 );
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SetConstant( FALSE );
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SetPrefix( NULL );
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}
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expr_variable( PNAME p, node_skl * pT );
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virtual void CopyTo( expr_node* lhs );
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virtual expr_node* Clone() { return new expr_variable(0); };
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// get the type
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virtual
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node_skl * GetType();
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//
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// set methods.
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//
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void SetName( PNAME p )
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{
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pIDName = p;
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}
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void SetPrefix( char * p )
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{
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pPrefix = p;
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}
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//
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// get methods
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//
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PNAME GetName()
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{
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return pIDName;
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}
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char * GetPrefix()
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{
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return pPrefix;
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}
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//
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// is this a variable expression.
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//
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virtual
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BOOL IsAVariable()
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{
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return TRUE;
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}
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//
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// Given an output steam, output the expression.
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//
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virtual
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void Print( ISTREAM * pS );
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//
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// Make (or add to) a list of var nodes of an expr
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//
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virtual
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short MakeListOfVars( ITERATOR & pList );
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//
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// determine the type of the expression
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//
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virtual
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void DetermineType();
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//
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// analyze the expression
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//
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virtual
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void ExprAnalyze( EXPR_CTXT * pExprCtxt );
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};
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//
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// This class represents a variable in an expression.
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// This expression node is instantiated for variables specified as fields of
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// a struct/union or as parameters. Contrast this to the resource class which
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// is VERY similar but only corresponds to the internally generated and used
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// variables in the stub routines.
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//
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class expr_named_constant : public expr_variable
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{
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public:
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//
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// the constructor expects the object to be instantiated using a name.
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// Sometimes one needs to instantiate a variable using the type too.
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//
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expr_named_constant( PNAME p = 0)
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: expr_variable( p )
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{
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SetConstant( TRUE );
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}
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expr_named_constant( PNAME p, node_skl * pT )
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: expr_variable( p, pT )
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{
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SetConstant( TRUE );
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}
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virtual expr_node* Clone() { return new expr_named_constant; };
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BOOL IsAVariable()
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{
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return FALSE;
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}
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//
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// if it is a constant id or label, we can return the value
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//
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virtual
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EXPR_VALUE GetValue();
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// similarly for expression
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expr_node * GetExpr();
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//
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// Make (or add to) a list of var nodes of an expr
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//
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virtual
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short MakeListOfVars( ITERATOR & pList );
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//
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// determine the type of the expression
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//
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virtual
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void DetermineType();
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//
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// analyze the expression
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//
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virtual
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void ExprAnalyze( EXPR_CTXT * pExprCtxt );
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};
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//
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// value type masks indicate the value type set by the user / determined from
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// the value of the constant.
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//
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#define VALUE_T_MASK_CLEAR (0x00)
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#define VALUE_T_MASK_CHAR (0x01)
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#define VALUE_T_MASK_SHORT (0x02)
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#define VALUE_T_MASK_LONG (0x04)
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|
#define VALUE_T_MASK_UCHAR (0x10)
|
|
#define VALUE_T_MASK_USHORT (0x20)
|
|
#define VALUE_T_MASK_ULONG (0x40)
|
|
|
|
|
|
class expr_constant : public expr_node
|
|
{
|
|
private:
|
|
|
|
//
|
|
// store the original format. If the original format is a null then
|
|
// the expression is printed out in the manner suitable for the type of
|
|
// the expression. If the original format is present, then the user
|
|
// declared this expression in this format and she wants it back in the
|
|
// header/stub file also in the same format.
|
|
|
|
PFORMAT Format;
|
|
|
|
union
|
|
{
|
|
char C;
|
|
short S;
|
|
long L;
|
|
__int64 I64;
|
|
float F;
|
|
double D;
|
|
unsigned char UC;
|
|
unsigned short US;
|
|
unsigned long UL;
|
|
unsigned __int64 UI64;
|
|
unsigned char* pC;
|
|
wchar_t* pWC;
|
|
} Value;
|
|
|
|
//
|
|
// get and set the format of the constant.
|
|
//
|
|
|
|
void SetFormat( PFORMAT p )
|
|
{
|
|
Format = p;
|
|
}
|
|
|
|
public:
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_constant(this); }
|
|
|
|
PFORMAT GetFormat() const
|
|
{
|
|
return Format;
|
|
}
|
|
//
|
|
// Different constructors are available for the different kind of constants
|
|
// that are possible.
|
|
//
|
|
|
|
expr_constant( char C,
|
|
PFORMAT pF = VALUE_TYPE_CHAR )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = C;
|
|
}
|
|
|
|
expr_constant( short S,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = S;
|
|
}
|
|
|
|
expr_constant( long L,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = L;
|
|
}
|
|
|
|
expr_constant( __int64 I64,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = I64;
|
|
}
|
|
|
|
expr_constant( float F,
|
|
PFORMAT pF = VALUE_TYPE_FLOAT )
|
|
{
|
|
SetFormat( pF );
|
|
Value.F = F;
|
|
}
|
|
|
|
expr_constant( double D,
|
|
PFORMAT pF = VALUE_TYPE_DOUBLE )
|
|
{
|
|
SetFormat( pF );
|
|
Value.D = D;
|
|
}
|
|
|
|
expr_constant( unsigned char UC,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC_U )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = UC;
|
|
}
|
|
|
|
expr_constant( unsigned short US,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC_U )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = US;
|
|
}
|
|
|
|
expr_constant( unsigned long UL,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = UL;
|
|
}
|
|
|
|
expr_constant( unsigned __int64 UI64,
|
|
PFORMAT pF = VALUE_TYPE_NUMERIC )
|
|
{
|
|
SetFormat( pF );
|
|
Value.I64 = (__int64)UI64;
|
|
}
|
|
|
|
expr_constant( char *pC,
|
|
PFORMAT pF = VALUE_TYPE_STRING )
|
|
{
|
|
SetFormat( pF );
|
|
Value.UI64 = (unsigned __int64)pC;
|
|
}
|
|
|
|
expr_constant( wchar_t *pWC,
|
|
PFORMAT pF = VALUE_TYPE_WSTRING )
|
|
{
|
|
SetFormat( pF );
|
|
Value.UI64 = (unsigned __int64)pWC;
|
|
}
|
|
|
|
expr_constant( const expr_constant *p)
|
|
{
|
|
SetFormat( p->GetFormat() );
|
|
Value = p->Value;
|
|
}
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
// gaj - return constant value assuming it is long for now...
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
BOOL GetExprValue( SExprValue& v )
|
|
{
|
|
// currently only floats and double use this code path
|
|
// fix this when expr evaluator is revamped
|
|
v.format = VALUE_TYPE_UNDEFINED;
|
|
if (Format == VALUE_TYPE_FLOAT)
|
|
{
|
|
v.format = Format;
|
|
v.f = Value.F;
|
|
}
|
|
else if (Format == VALUE_TYPE_DOUBLE)
|
|
{
|
|
v.format = Format;
|
|
v.d = Value.D;
|
|
}
|
|
return TRUE;
|
|
}
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
//
|
|
// determine the type of the expression
|
|
//
|
|
|
|
virtual
|
|
void DetermineType();
|
|
|
|
//
|
|
// analyze the expression
|
|
//
|
|
virtual
|
|
void ExprAnalyze( EXPR_CTXT * pExprCtxt );
|
|
|
|
//
|
|
// test if the expression is a string constant
|
|
//
|
|
virtual
|
|
BOOL IsStringConstant (void)
|
|
{
|
|
return (Format == VALUE_TYPE_STRING || Format == VALUE_TYPE_WSTRING);
|
|
}
|
|
};
|
|
|
|
//
|
|
// some convenient helper functions to get vanilla constant 0 and constant 1
|
|
//
|
|
|
|
extern expr_constant * GetConstant0();
|
|
|
|
extern expr_constant * GetConstant1();
|
|
|
|
|
|
|
|
//
|
|
// the operator classes. These classes are group into unary binary and
|
|
// ternary expression classes.
|
|
//
|
|
|
|
class expr_operator : public expr_node
|
|
{
|
|
private:
|
|
OPERATOR Operator;
|
|
public:
|
|
|
|
//
|
|
// the constructor of an abstract base class does nothing.
|
|
//
|
|
|
|
expr_operator( OPERATOR Op )
|
|
{
|
|
SetOperator( Op );
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_operator( OP_ILLEGAL ); };
|
|
//
|
|
// get and set functions.
|
|
//
|
|
|
|
void SetOperator( OPERATOR Op )
|
|
{
|
|
Operator = Op;
|
|
}
|
|
|
|
OPERATOR GetOperator()
|
|
{
|
|
return Operator;
|
|
}
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
void PrintSubExpr( expr_node *, ISTREAM * pS );
|
|
|
|
};
|
|
|
|
|
|
//
|
|
// unary operator classes.
|
|
//
|
|
|
|
class expr_op_unary : public expr_operator
|
|
{
|
|
private:
|
|
expr_node * pLeft;
|
|
|
|
public:
|
|
|
|
//
|
|
// the constructor. This class is instantiated by supplying operator and
|
|
// the left had side expression values.
|
|
//
|
|
|
|
expr_op_unary( OPERATOR Op, expr_node *pL) :
|
|
expr_operator(Op)
|
|
{
|
|
SetLeft( pL );
|
|
if ( pL ) SetConstant( pL->IsConstant() );
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_op_unary( OP_ILLEGAL, 0 ); };
|
|
//
|
|
// get and set routines.
|
|
//
|
|
|
|
expr_node * SetLeft( expr_node * pL )
|
|
{
|
|
return ( pLeft = pL );
|
|
}
|
|
|
|
virtual
|
|
expr_node * GetLeft()
|
|
{
|
|
return pLeft;
|
|
}
|
|
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsUnaryOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
//
|
|
// Make (or add to) a list of var nodes of an expr
|
|
//
|
|
virtual
|
|
short MakeListOfVars( ITERATOR & pList );
|
|
|
|
//
|
|
// determine the type of the expression
|
|
//
|
|
|
|
virtual
|
|
void DetermineType();
|
|
|
|
//
|
|
// analyze the expression
|
|
//
|
|
virtual
|
|
void ExprAnalyze( EXPR_CTXT * pExprCtxt );
|
|
|
|
virtual
|
|
short MakeListOfDerefedVars( ITERATOR& List )
|
|
{
|
|
if( GetLeft() )
|
|
return GetLeft()->MakeListOfDerefedVars( List );
|
|
return 0;
|
|
}
|
|
|
|
};
|
|
|
|
|
|
//
|
|
// binary operator class. Each binary operator node takes a left and right
|
|
// expression connected by the binary operator.
|
|
//
|
|
|
|
class expr_op_binary : public expr_operator
|
|
{
|
|
private:
|
|
|
|
expr_node * pLeft;
|
|
expr_node * pRight;
|
|
|
|
public:
|
|
|
|
//
|
|
// this class is instantiated by specifying the left/right and the
|
|
// operator.
|
|
//
|
|
|
|
expr_op_binary( OPERATOR Op,
|
|
expr_node * pL,
|
|
expr_node * pR ) :
|
|
expr_operator( Op )
|
|
{
|
|
SetLeft( pL );
|
|
SetRight( pR );
|
|
SetConstant( ( (pL) ? pL->IsConstant() : TRUE ) &&
|
|
( (pR) ? pR->IsConstant() : TRUE ) );
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_op_binary( OP_ILLEGAL, 0, 0 ); };
|
|
//
|
|
// get and set.
|
|
//
|
|
|
|
virtual
|
|
expr_node * SetLeft( expr_node *p )
|
|
{
|
|
return (pLeft = p);
|
|
}
|
|
|
|
virtual
|
|
expr_node * SetRight( expr_node *p )
|
|
{
|
|
return (pRight = p);
|
|
}
|
|
|
|
virtual
|
|
expr_node * GetLeft()
|
|
{
|
|
return pLeft;
|
|
}
|
|
|
|
virtual
|
|
expr_node * GetRight()
|
|
{
|
|
return pRight;
|
|
}
|
|
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsBinaryOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
virtual
|
|
void PrintCall( ISTREAM * pS,
|
|
short LeftMargin,
|
|
BOOL fInProc );
|
|
//
|
|
// Make (or add to) a list of var nodes of an expr
|
|
//
|
|
virtual
|
|
short MakeListOfVars( ITERATOR & pList );
|
|
|
|
virtual
|
|
short MakeListOfDerefedVars( ITERATOR& List );
|
|
|
|
//
|
|
// determine the type of the expression
|
|
//
|
|
|
|
virtual
|
|
void DetermineType();
|
|
|
|
//
|
|
// analyze the expression
|
|
//
|
|
virtual
|
|
void ExprAnalyze( EXPR_CTXT * pExprCtxt );
|
|
|
|
};
|
|
|
|
|
|
//
|
|
// this is the unary arithmetic class. Corresponding to the unary arithmetic
|
|
// operators + and -.
|
|
//
|
|
|
|
class expr_u_arithmetic : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_u_arithmetic( OPERATOR Op,
|
|
expr_node * pL ) :
|
|
expr_op_unary(Op, pL)
|
|
{
|
|
}
|
|
virtual expr_node* Clone() { return new expr_u_arithmetic( OP_ILLEGAL, 0 ); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsArithmeticOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
//
|
|
// test if the expression is a string constant
|
|
//
|
|
virtual
|
|
BOOL IsStringConstant (void)
|
|
{
|
|
return GetLeft()->IsStringConstant();
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
BOOL GetExprValue( SExprValue& v );
|
|
|
|
};
|
|
|
|
|
|
//
|
|
// this is the unary not operator class.
|
|
//
|
|
|
|
class expr_u_not : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_u_not( expr_node * pL ) :
|
|
expr_op_unary(OP_UNARY_NOT, pL )
|
|
{
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_u_not( 0 ); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsLogicalOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
};
|
|
|
|
|
|
//
|
|
// the unary complement class.
|
|
//
|
|
|
|
class expr_u_complement : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_u_complement( expr_node *pL ) :
|
|
expr_op_unary(OP_UNARY_COMPLEMENT, pL)
|
|
{
|
|
}
|
|
virtual expr_node* Clone() { return new expr_u_complement( 0 ); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsBitwiseOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
};
|
|
|
|
//
|
|
// unary derefence operator
|
|
//
|
|
|
|
class expr_u_deref : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_u_deref( expr_node *pL ) :
|
|
expr_op_unary(OP_UNARY_INDIRECTION, pL)
|
|
{
|
|
SetConstant( FALSE );
|
|
}
|
|
expr_u_deref( OPERATOR op, expr_node *pL ) :
|
|
expr_op_unary(op, pL)
|
|
{
|
|
SetConstant( FALSE );
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_u_deref( 0 ); };
|
|
virtual
|
|
short MakeListOfDerefedVars( ITERATOR& List );
|
|
|
|
};
|
|
|
|
//
|
|
//
|
|
class expr_u_address : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_u_address( expr_node *pL ) :
|
|
expr_op_unary(OP_UNARY_AND, pL)
|
|
{
|
|
SetConstant( FALSE );
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_u_address( 0 ); };
|
|
};
|
|
|
|
|
|
//
|
|
// the unary cast operator
|
|
//
|
|
class expr_cast : public expr_op_unary
|
|
{
|
|
node_skl* pCastType;
|
|
bool fEmitModifiers;
|
|
|
|
public:
|
|
expr_cast( node_skl * pT, expr_node *pL ) :
|
|
expr_op_unary(OP_UNARY_CAST, pL),
|
|
fEmitModifiers( true )
|
|
{
|
|
pCastType = pT;
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_cast( 0, 0 ); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
virtual
|
|
void SetEmitModifiers(bool fModifier = true) { fEmitModifiers = fModifier; }
|
|
virtual
|
|
bool GetEmitModifiers() { return fEmitModifiers; }
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
virtual
|
|
node_skl * GetType()
|
|
{
|
|
return pCastType;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// the unary sizeof operator.
|
|
//
|
|
|
|
class expr_sizeof : public expr_op_unary
|
|
{
|
|
node_skl * pType;
|
|
|
|
public:
|
|
expr_sizeof( node_skl *pT) :
|
|
expr_op_unary( OP_UNARY_SIZEOF,NULL )
|
|
{
|
|
pType = pT;
|
|
}
|
|
|
|
expr_sizeof( expr_node *pL ) :
|
|
expr_op_unary( OP_UNARY_SIZEOF,pL )
|
|
{
|
|
pType = pL->GetType();
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_sizeof( (node_skl*)0 ); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
virtual
|
|
short MakeListOfVars( ITERATOR & pList );
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// the unary __alignof operator.
|
|
//
|
|
|
|
class expr_alignof : public expr_op_unary
|
|
{
|
|
node_skl * pType;
|
|
|
|
public:
|
|
expr_alignof( node_skl *pT) :
|
|
expr_op_unary( OP_UNARY_ALIGNOF, NULL )
|
|
{
|
|
pType = pT;
|
|
}
|
|
|
|
expr_alignof( expr_node *pL ) :
|
|
expr_op_unary( OP_UNARY_ALIGNOF, pL )
|
|
{
|
|
pType = pL->GetType();
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_alignof( (node_skl*)0 ); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
virtual
|
|
short MakeListOfVars( ITERATOR & pList );
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// unary pre-increment operator.
|
|
//
|
|
class expr_pre_incr : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_pre_incr( expr_node *pL ) :
|
|
expr_op_unary(OP_PRE_INCR, pL)
|
|
{
|
|
SetType( pL->GetType());
|
|
}
|
|
virtual expr_node* Clone() { return new expr_pre_incr(0); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// unary pre-decrement operator.
|
|
//
|
|
class expr_pre_decr : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_pre_decr( expr_node *pL ):
|
|
expr_op_unary(OP_PRE_DECR, pL)
|
|
{
|
|
SetType( pL->GetType());
|
|
}
|
|
virtual expr_node* Clone() { return new expr_pre_decr(0); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// unary post-increment operator.
|
|
//
|
|
class expr_post_incr : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_post_incr( expr_node *pL ):
|
|
expr_op_unary(OP_POST_INCR, pL)
|
|
{
|
|
SetType( pL->GetType());
|
|
}
|
|
virtual expr_node* Clone() { return new expr_post_incr(0); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// unary post-decrement operator.
|
|
//
|
|
class expr_post_decr : public expr_op_unary
|
|
{
|
|
public:
|
|
expr_post_decr( expr_node *pL ):
|
|
expr_op_unary(OP_POST_DECR, pL)
|
|
{
|
|
SetType( pL->GetType());
|
|
}
|
|
virtual expr_node* Clone() { return new expr_post_decr(0); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// binary arithmetic operators.
|
|
//
|
|
|
|
class expr_b_arithmetic : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_b_arithmetic( OPERATOR Op,
|
|
expr_node *pL,
|
|
expr_node *pR ):
|
|
expr_op_binary( Op, pL, pR )
|
|
{
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_b_arithmetic(OP_ILLEGAL,0,0); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsArithmeticOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
BOOL GetExprValue( SExprValue& v );
|
|
|
|
};
|
|
|
|
//
|
|
// binary logical operators.
|
|
//
|
|
|
|
class expr_b_logical : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_b_logical( OPERATOR Op,
|
|
expr_node *pL,
|
|
expr_node *pR ):
|
|
expr_op_binary( Op, pL, pR )
|
|
{
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_b_logical(OP_ILLEGAL,0,0); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsLogicalOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// relational operators.
|
|
//
|
|
|
|
class expr_relational : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_relational( OPERATOR Op,
|
|
expr_node *pL,
|
|
expr_node *pR ):
|
|
expr_op_binary( Op, pL, pR )
|
|
{
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_relational(OP_ILLEGAL,0,0); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsRelationalOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// shift operators.
|
|
//
|
|
|
|
class expr_shift : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_shift( OPERATOR Op,
|
|
expr_node *pL,
|
|
expr_node *pR ):
|
|
expr_op_binary( Op, pL, pR )
|
|
{
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_shift(OP_ILLEGAL,0,0); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsShiftOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// bitwise operators.
|
|
//
|
|
|
|
class expr_bitwise : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_bitwise( OPERATOR Op,
|
|
expr_node *pL,
|
|
expr_node *pR ):
|
|
expr_op_binary( Op, pL, pR )
|
|
{
|
|
}
|
|
|
|
virtual expr_node* Clone() { return new expr_bitwise(OP_ILLEGAL,0,0); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsBitwiseOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// dot operator.
|
|
//
|
|
|
|
class expr_dot : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_dot( expr_node *pL, expr_node *pR ):
|
|
expr_op_binary( OP_DOT, pL, pR )
|
|
{
|
|
}
|
|
virtual expr_node* Clone() { return new expr_dot(0,0); };
|
|
};
|
|
|
|
//
|
|
// pointsto operator.
|
|
//
|
|
|
|
class expr_pointsto : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_pointsto( expr_node *pL, expr_node *pR ):
|
|
expr_op_binary( OP_POINTSTO, pL, pR )
|
|
{
|
|
}
|
|
virtual expr_node* Clone() { return new expr_pointsto(0,0); };
|
|
};
|
|
|
|
//
|
|
// array element operator.
|
|
//
|
|
|
|
class expr_index : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_index( expr_node *pL, expr_node *pR );
|
|
|
|
virtual expr_node* Clone() { return new expr_index(0,0); };
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
virtual
|
|
void PrintCall( ISTREAM * pS,
|
|
short LeftMargin,
|
|
BOOL fInProc );
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// comma operator.
|
|
//
|
|
|
|
class expr_comma : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_comma( expr_node *pL, expr_node *pR ):
|
|
expr_op_binary( OP_COMMA, pL, pR )
|
|
{
|
|
}
|
|
virtual expr_node* Clone() { return new expr_comma(0,0); };
|
|
};
|
|
|
|
//
|
|
// assign operator.
|
|
//
|
|
|
|
class expr_assign : public expr_op_binary
|
|
{
|
|
public:
|
|
|
|
expr_assign( expr_node *pL, expr_node *pR ):
|
|
expr_op_binary( OP_ASSIGN, pL, pR )
|
|
{
|
|
}
|
|
virtual expr_node* Clone() { return new expr_assign(0,0); };
|
|
virtual
|
|
void PrintCall( ISTREAM * pS,
|
|
short LeftMargin,
|
|
BOOL fInProc );
|
|
|
|
|
|
};
|
|
|
|
//
|
|
// proc operator.
|
|
//
|
|
|
|
class expr_proc_call : public expr_op_unary
|
|
{
|
|
private:
|
|
PNAME pName;
|
|
short NoOfParams;
|
|
|
|
//
|
|
// Set the first parameter of the function. This is a private method
|
|
// because the world should use the SetParam function which will take care
|
|
// of inserting the new param expression in the correct (last) place in the
|
|
// parameter list.
|
|
//
|
|
|
|
class expr_param * SetFirstParam( class expr_param * p )
|
|
{
|
|
return (class expr_param *)SetLeft(
|
|
(class expr_node *) p );
|
|
}
|
|
|
|
public:
|
|
|
|
expr_proc_call(PNAME pN,
|
|
expr_node *pParamList):
|
|
expr_op_unary(OP_FUNCTION,pParamList)
|
|
{
|
|
SetName( pN );
|
|
SetNoOfParams( 0 );
|
|
}
|
|
|
|
expr_proc_call( PNAME pN ) :
|
|
expr_op_unary(OP_FUNCTION, 0)
|
|
{
|
|
SetName( pN );
|
|
SetNoOfParams( 0 );
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_proc_call(0); };
|
|
//
|
|
// get and set functions.
|
|
//
|
|
|
|
void SetName( PNAME pN )
|
|
{
|
|
pName = pN;
|
|
}
|
|
|
|
PNAME GetName()
|
|
{
|
|
return pName;
|
|
}
|
|
|
|
unsigned short SetNoOfParams( unsigned short N )
|
|
{
|
|
return (NoOfParams = N);
|
|
}
|
|
|
|
unsigned short GetNoOfParams()
|
|
{
|
|
return NoOfParams;
|
|
}
|
|
unsigned short IncrNoOfParams()
|
|
{
|
|
return (++NoOfParams);
|
|
}
|
|
//
|
|
// This method is used to get at the first param of a function. After
|
|
// that GetNextParam calls are made on the param node itself. This will
|
|
// be our most frequent usage, eg in the printing of the expression.
|
|
//
|
|
|
|
class expr_param * GetFirstParam()
|
|
{
|
|
return (class expr_param *)GetLeft();
|
|
}
|
|
|
|
//
|
|
// This method will insert the parameter expression at the end of the
|
|
// parameter list. This is done so that an procedure call expression
|
|
// can be created in the natural (left to right) order.
|
|
//
|
|
|
|
class expr_param * SetParam( class expr_param * pParam );
|
|
|
|
class expr_param * SetParam( expr_node * pExpr );
|
|
|
|
//
|
|
// Given an output steam, output the expression. This does not
|
|
// generate a semi-colon.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
|
|
//
|
|
// This call generates a call with a semi-colon
|
|
//
|
|
|
|
virtual
|
|
void PrintCall( ISTREAM * pS, short InitMargin, BOOL fInProc );
|
|
|
|
};
|
|
|
|
class expr_param : public expr_op_binary
|
|
{
|
|
private:
|
|
PNAME pName;
|
|
public:
|
|
|
|
expr_param(expr_node *pParamExpr ):
|
|
expr_op_binary(OP_PARAM,pParamExpr, 0)
|
|
{
|
|
pName = NULL;
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone() { return new expr_param(0); };
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
//
|
|
// This method gets the next parameter in the parameter list. To emit the
|
|
// parameter expressions for a procedure, get the first parameter on the
|
|
// expr_proc_call node and then make GetNextParam calls on the parameter
|
|
// till the call returns a null.
|
|
//
|
|
|
|
expr_param * GetNextParam()
|
|
{
|
|
return (expr_param *)GetRight();
|
|
}
|
|
|
|
//
|
|
// This method sets the next param expression to be the one specified. This
|
|
// method does not traverse the list of params and insert at the end !!.
|
|
//
|
|
|
|
expr_param * SetNextParam( expr_param * p )
|
|
{
|
|
return (expr_param *)SetRight( p );
|
|
}
|
|
|
|
//
|
|
// This method traverses to the end of the parameter list and inserts a new
|
|
// param expression at the end .Use this method when a procedure call
|
|
// expression is being generated. The way to do this is to create a
|
|
// expr_proc_call node and make as many SetParam calls to it as there are
|
|
// parameter expressions. They will all get inserted into the parameter list
|
|
// in the left to right (natural) order, with each new param expression
|
|
// going to the end of the list.
|
|
//
|
|
|
|
expr_param * SetLastPeerParam( expr_param * pN );
|
|
|
|
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS );
|
|
|
|
|
|
virtual
|
|
void PrintCall( ISTREAM * pS,
|
|
short LeftMargin,
|
|
BOOL fInProc );
|
|
|
|
};
|
|
|
|
|
|
|
|
//
|
|
// ternary operator class. Each ternary operator node takes a relational, left and right
|
|
// expression connected by the ternary operator.
|
|
//
|
|
|
|
class expr_ternary : public expr_operator
|
|
{
|
|
private:
|
|
|
|
expr_node * pLeft;
|
|
expr_node * pRight;
|
|
expr_node * pRelational;
|
|
|
|
public:
|
|
|
|
//
|
|
// this class is instantiated by specifying the left/right and the
|
|
// operator.
|
|
//
|
|
|
|
expr_ternary( OPERATOR Op,
|
|
expr_node * pRel,
|
|
expr_node * pL,
|
|
expr_node * pR ) :
|
|
expr_operator( Op )
|
|
{
|
|
SetRelational( pRel );
|
|
SetLeft( pL );
|
|
SetRight( pR );
|
|
SetConstant( ( (pL) ? pL->IsConstant() : TRUE ) &&
|
|
( (pR) ? pR->IsConstant() : TRUE ) &&
|
|
( (pRel) ? pRel->IsConstant() : TRUE ) );
|
|
}
|
|
|
|
virtual void CopyTo( expr_node* lhs );
|
|
|
|
virtual expr_node* Clone();
|
|
//
|
|
// get and set.
|
|
//
|
|
|
|
virtual
|
|
expr_node * SetRelational( expr_node *p )
|
|
{
|
|
return (pRelational = p);
|
|
}
|
|
|
|
virtual
|
|
expr_node * SetLeft( expr_node *p )
|
|
{
|
|
return (pLeft = p);
|
|
}
|
|
|
|
virtual
|
|
expr_node * SetRight( expr_node *p )
|
|
{
|
|
return (pRight = p);
|
|
}
|
|
|
|
virtual
|
|
expr_node * GetRelational()
|
|
{
|
|
return pRelational;
|
|
}
|
|
virtual
|
|
expr_node * GetLeft()
|
|
{
|
|
return pLeft;
|
|
}
|
|
|
|
|
|
virtual
|
|
expr_node * GetRight()
|
|
{
|
|
return pRight;
|
|
}
|
|
|
|
//
|
|
// queries.
|
|
//
|
|
|
|
virtual
|
|
BOOL IsBinaryOperator()
|
|
{
|
|
return TRUE;
|
|
}
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
void Print( ISTREAM * pS );
|
|
|
|
virtual
|
|
EXPR_VALUE GetValue();
|
|
|
|
|
|
//
|
|
// determine the type of the expression
|
|
//
|
|
|
|
virtual
|
|
void DetermineType();
|
|
|
|
//
|
|
// analyze the expression
|
|
//
|
|
virtual
|
|
void ExprAnalyze( EXPR_CTXT * pExprCtxt );
|
|
|
|
virtual
|
|
short MakeListOfVars( ITERATOR & pList );
|
|
|
|
};
|
|
|
|
|
|
// gaj - these are added for now to satisfy the grammar
|
|
|
|
class expr_init_list: public expr_node
|
|
{
|
|
private:
|
|
class expr_init_list * pSibling;
|
|
class expr_node * pExpr;
|
|
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public:
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expr_init_list( expr_node * pE )
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|
{
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|
pExpr = pE;
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|
SetConstant( pE->IsConstant() );
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|
};
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|
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virtual void CopyTo( expr_node* lhs );
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|
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virtual expr_node* Clone() { return new expr_init_list(0); };
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|
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|
virtual
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|
void LinkSibling( class expr_init_list * pIL )
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|
{
|
|
pSibling = pIL;
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|
}
|
|
|
|
// assume only the first value here...
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|
virtual
|
|
EXPR_VALUE GetValue()
|
|
{
|
|
return pExpr->GetValue();
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|
}
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|
|
|
//
|
|
// Given an output steam, output the expression.
|
|
//
|
|
|
|
virtual
|
|
void Print( ISTREAM * pS )
|
|
{
|
|
pExpr->Print( pS );
|
|
}
|
|
|
|
//
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|
// determine the type of the expression
|
|
//
|
|
|
|
virtual
|
|
void DetermineType();
|
|
|
|
//
|
|
// analyze the expression
|
|
//
|
|
virtual
|
|
void ExprAnalyze( EXPR_CTXT * pExprCtxt );
|
|
|
|
};
|
|
|
|
|
|
class expr_error: public expr_node
|
|
{
|
|
public:
|
|
virtual expr_node* Clone() { return new expr_error; };
|
|
};
|
|
|
|
#endif // __EXPR_HXX__
|